The episode begins with a psychological crisis of Ciel: His fear of the curse and traumatic memories leads to panic outbursts in which he rejects Sebastian and the servants. Sebastian confronts him drastically and threatens to break their contract if Ciel abandons his role as Earl. This forces Ciel to face his true motivation—revenge for himself, not for others—whereupon he regains his determination and apologizes to the servants.

In parallel, John Brown, a messenger of the queen, arrives with an urgent message urging haste. Sebastian reveals that analyses of the "curse" by the royal household identified chemical substances (C4) in the forest plants and the remedy—a hint at a scientific, not magical, cause of the deformations.

Meanwhile, Sullivan's conflict is revealed: She wants to explore the outside world but is held back by Wolfram, who prioritizes her safety above all. At the same time, Sebastian and Snake discover that the villager Anne carries the scent of a werewolf, suggesting connections between the village and the werewolves.

The episode culminates in the revelation of Sullivan's "Ultimate Magic Formula," which she secretly advances to pacify the werewolves. The queen also invites Sullivan via letter to an audience, hinting at political entanglements.

The episode ends with Ciel's return to his former strength and preparations for departure, while the true intentions of the villagers, Sullivan's magic, and the role of the chemical substance continue to pose mysteries.